Is DNA Stoffwechseltest useful for Fruchtbarkeit?

A DNA metabolism test, such as those offered by MyBody-X or similar companies, is not scientifically validated for assessing fertility. These tests typically analyze polygenic scores for metabolism, fitness, or nutrition, which are based on GWAS data but have very low predictive power for complex traits. Fertility is influenced by numerous factors: hormonal status, age, lifestyle, environment, and medical conditions. While genetics play a role, the effects of individual SNPs are tiny and insufficient for clinically relevant conclusions. Consumer DNA tests cannot diagnose conditions – in Germany, the GenDG law prohibits diagnostic claims without a physician. Even if a test finds variants in genes like MTHFR or FTO, the link to fertility is weak and unvalidated. The evidence is best classified as 'gwas' or 'marketing'. Anyone with fertility concerns should consult a specialist and rely on established biomarkers (e.g., hormone levels, AMH, sperm analysis) rather than a DNA metabolism test.